Radio 4 listeners have woken to the melodious sound of birdsong since the station began its early morning Tweet of the Day slot earlier this year to educate the nation about the calls of British species.
However, some wildlife lovers have been left annoyed that the producers have chosen to include rare migrant birds that only stop in the UK for a few weeks of the year.
One frustrated listener, Steve Norris, wrote to Radio Times: “Since July, we’ve been subjected to more and more ‘passage migrants’ that most of us are totally unfamiliar with.
“I don’t class these birds as British, so why are we listening to them?”
The BBC has included some rare species because its selection is based on the official list of nearly 600 British birds compiled by the British Ornithologists Union (BOU), whose qualification for entry is that a bird must have landed on UK soil once.